Evidence required to demonstrate competence in this unit must be relevant to and satisfy all of the requirements of the elements and performance criteria and include knowledge of: battery storage systems: battery storage systems for grid-connected PV systems including: applications for battery storage including: electrical energy supply during grid outages electrical energy supply direct to loads during periods of high tariffs purpose of each component in battery storage systems for grid-connected PV systems functional block diagrams for typical configurations of battery storage systems for grid-connected PV systems including: multimode inverter/s for connecting to renewable energy, grid, loads and battery storage; these inverter/s provide backup to dedicated loads on grid failure and may: have a built in charge controller for direct connection of a PV array or require a separate charge controller to direct current (DC) couple the PV array and battery two types of inverters comprising, PV grid-connected inverter/s and multimode inverter/s where: both inverter types are connected to the grid and loads via a switching device that may provide backup to dedicated loads during grid failure both inverter types are connected to the grid and only the multimode inverter/s may provide backup to dedicated loads on grid failure only the multimode inverter/s are connected to the grid. The grid-connected inverter/s are alternate current (AC) coupled to the multimode inverter/s and both types can provide backup to dedicated loads on grid failure charge controllers including: types and applications of charge controllers for different system configuration specifications of a charge controller, including: output rating DC voltage operating window and/or rating DC current rating in and out efficiency grid-connected batteries: battery terms including: nominal voltage cell primary and secondary cells battery charge and discharge rate amp hour capacity watt hour capacity state of charge (SOC) depth of discharge (DOD) battery types including: major features of commercially available types of batteries suitable for battery storage systems for grid-connected PV systems factors affecting the life of commercially available types of batteries including the estimation of battery life charging regimes suitable for commercially available types of batteries battery safety including: hazards associated with handling, installing or maintaining commercially available types of batteries and risk control measures procedures for safe disposal of commercially available types of batteries common processes leading to battery failure in commercially available batteries including sulphation and stratification in lead acid batteries grid-connected inverters: inverters including: differences between multimode and grid connect inverters output rating of a multimode inverter/s in relation to: required maximum demand capacity for battery charging program parameters for a multimode inverter, for the correct operation of the system grid-connected storage systems fault finding: fault finding procedures including: fault finding procedures for individual equipment fault finding procedures for interconnected systems grid-connected storage systems installations: installation requirements including: installing battery storage devices in accordance with system design documentation, relevant industry standards, regulations and manufacturer requirements installing inverters suitable for connecting to battery storage in accordance with system design documentation, relevant industry standards, regulations and manufacturer requirements installing charge controllers in accordance with system design documentation, relevant industry standards, regulations and manufacturer requirements installing all balance of system equipment in accordance with system design documentation, relevant industry standards, regulations and manufacturer requirements electrical drawings including: electrical systems circuit diagrams of typical battery storage systems for grid-connected PV systems including: AC loads being supplied during periods when grid is unavailable all major components protection devices earthing isolation switching metering equipment location plan/s to show the locations of equipment, fittings and cabling grid-connected storage systems maintenance procedures including: maintenance requirements for individual equipment maintenance requirements for interconnected systems grid-connected storage systems testing and commissioning procedures including: safe testing of equipment safe testing of system operation commissioning of battery storage system. |